Perhaps you should try some spelling variations:
van thanh » ban thanh
toc sach » hoc sach, doc sach, thuoc sach
van tuan » van quan, van ban, anh tuan
hieu ve » hieu va, hieu van
ve phan » va phan, ke phan, ve phat
va cua » va chua, via cua, ca cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ky nang x hoi. hieu ve phan tu ((van thanh) OR (van tuan)) va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang x hoi. hieu ve phan tu ((van thanh) OR (van tuan)) va cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ky nang x hoi. hieu ve phan tu ((van thanh) OR (van tuan)) va cua te*".